561509283 has 6 divisors (see below), whose sum is σ = 748733772. Its totient is φ = 374312160.

The previous prime is 561509239. The next prime is 561509287. The reversal of 561509283 is 382905165.

It is not a de Polignac number, because 561509283 - 2¹⁸ = 561247139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561509287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34203 + ... + 47883.

It is an arithmetic number, because the mean of its divisors is an integer number (124788962).

Almost surely, 2^561509283 is an apocalyptic number.

561509283 is a deficient number, since it is larger than the sum of its proper divisors (187224489).

561509283 is an frugal number, since it uses more digits than its factorization.

561509283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27365 (or 13684 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 561509283 is about 23696.1870983498. The cubic root of 561509283 is about 824.9968940195.

The spelling of 561509283 in words is "five hundred sixty-one million, five hundred nine thousand, two hundred eighty-three".